155results about "Lignin material coatings" patented technology

The invention discloses a high-light-resistance nano lignin-based composite coating as well as a preparation method and application thereof, and belongs to the technical field of wood protection. Compared with traditional unmodified lignin, the high-light-resistance nano lignin-based composite coating prepared by taking lignin nanoparticles prepared from quaternized lignin and nano TiO2 as raw materials has more excellent light resistance; according to the high-light-resistance nano lignin-based composite coating provided by the invention, the original texture of wood can be reserved, and the defects of a traditional protection method are effectively overcome. In addition, according to the preparation method of the high-light-resistance nano lignin-based composite coating, raw materials are saved, and the high resource utilization rate is achieved. The high-light-resistance nano lignin-based composite coating can remarkably improve the ageing resistance of wood, and the application prospect of the wood in the fields of outdoor landscape building materials, durable furniture, wood packaging and the like is expanded.

The present disclosure relates to the technical field of film material, and particularly to a polymeric polyphenol-modified polymer film, a preparation method thereof and a metallized polymer film. According to the present disclosure, corona treatment is performed to a surface of a polymer layer, so that a polar modifying liquid can uniformly coat the surface of the polymer layer, thereby forming a modification layer tightly combined with the polymer layer. Thus, the low-polarity polymer layer surface can be imparted with a durable high polarity. Consequently, the polymer layer is capable of being stably and tightly bonded to a material layer with high polarity and high surface tension, such as a metal layer, for a long period of time, effectively broadening the application scenarios for non-polar polymer substrate layers. By controlling the concentrations of the polyphenolic compound and the cross-linking agent in the modifying liquid, the modification layer formed by a cross-linking reaction can have a suitable cross-linking density and an adequate number of hydroxyl groups, thereby further effectively and stably enhancing the long-term polarity and surface tension of the polymer layer. The preparation method is simple and easy to operate, cost-effective, efficient, and easy to scale up.

The invention discloses a self-crosslinking exterior wall coating containing reinforcing fibers and a preparation method thereof. The coating comprises the following components by mass: 10-20% water, 0.1-0.5% bentonite, 0.1-0.5% cellulose, 3-8% reinforcing fibers, 0.5-2% ethylene glycol, 0.5-1.5% dispersant, 0.1-0.5% wetting agent, 0.1-0.3% multifunctional additive, 15-25% titanium dioxide, 8-15% precipitated barium sulfate, 2-8% silane-modified nano-silica, 5-10% water-based polyurethane emulsion, 30-40% organosilicon-modified acrylic emulsion, 1-3% film-forming aid, 0.1-0.3% bactericide, 0.1-0.2% preservative, 0.5-1% mildew inhibitor, 0.3-1.1% defoaming agent, and 0.5-1.8% leveling agent. By compounding silicone-modified acrylic emulsion and water-based polyurethane emulsion, and adding silane-modified nano-silica and reinforcing fibers, the coating has excellent resistance to artificial weathering, wear resistance, impact resistance, corrosion resistance and high hardness.

The invention relates to the technical field of insulating paint, in particular to insulating paint capable of preventing bird damage and foreign matter lap joint and a preparation method of the insulating paint. The invention provides an insulating coating for preventing bird damage and foreign matter lap joint. The insulating coating is prepared from the following raw materials in parts by weight: 55 to 80 parts of methylsilane modified polyurethane liquid, 23 to 40 parts of polyamide fiber nano powder, 10 to 20 parts of organic silicon modified calcium lignosulphonate suspension, 8 to 10 parts of hydrophobic silicon dioxide, 2 to 5 parts of flatting agent, 1 to 2 parts of pigment, 3 to 5 parts of anti-aging agent and 10 to 15 parts of diluent. The insulating property of the coating is extremely high, the withstand voltage value per millimeter can reach 40kV and above, while the withstand voltage value per millimeter of a conventional insulating coating is generally 18kV; and the insulating paint is high in strength and good in toughness, and has good hydrophobicity and hydrophobicity migration.

The invention relates to the technical field of composite membrane preparation, in particular to a lignin-cellulose nanofiber-based composite membrane, a preparation method and application. The preparation method comprises the following steps: mixing a carboxylated cellulose nanofiber aqueous solution, a polyvinyl alcohol aqueous solution and an ethanol solution of 4-phenylazo phenol, pouring into a mold, and drying to obtain a basement membrane; polyimide and dealkalized lignin are used as raw materials, polyethylene glycol diglycidyl ether is used as a cross-linking agent, condensation reaction is carried out in the presence of a solvent, a dealkalized lignin-polyimide composite solution is obtained, a basement membrane is coated with the dealkalized lignin-polyimide composite solution, drying treatment is carried out, and the lignin-cellulose nanofiber-based composite membrane is obtained. The lignin-cellulose nanofiber-based composite membrane prepared by the preparation method disclosed by the invention not only has excellent photothermal conversion and humidity gradient change properties, but also has excellent wet responsiveness and photoresponsiveness, and overcomes the defects in the prior art.

The invention belongs to the technical field of nano materials and environment-friendly functional coatings, and discloses a preparation method and application of a lignin-based super-hydrophobic coating. The method comprises the steps that lignin is pretreated with ethylene carbonate to break steric hindrance and improve the grafting rate, then hexadecyl trimethoxy silane is added for grafting to form a hydrophobic chain, and surface energy is reduced; then adding silicon dioxide and N, N-dimethylformamide, carrying out ultrasonic dispersion to synergistically construct a micro-nano coarse structure, spraying the micro-nano coarse structure on a base material by using a spraying method, and putting the base material into a drying oven for curing, so as to obtain the lignin-based super-hydrophobic coating material. According to the method disclosed by the invention, a high-activity epoxy group is grafted on a lignin skeleton through ethylene carbonate pretreatment, so that steric hindrance in a three-dimensional space is broken, and dense anchor points are provided for a subsequent hydrophobic chain; then cocondensing with hexadecyl trimethoxy silane to form an alkyl-siloxane double network, and cooperating with nano silicon dioxide to construct micro-nano double roughness, so that a stable super-hydrophobic core under a fluorine-free condition is realized, and the technical route is simple and efficient.

The invention aims to provide a preparation method and application of a CMC / PVA active packaging film coated with chitosan-tannic acid on the surface, and belongs to the field of food preservation. Comprising the following steps: firstly, preparing a CP40 film, and then preparing a CP40 / CT% composite film: preparing a chitosan solution with the mass concentration of 1%, adding tannic acid TA into the chitosan solution, stirring for 30 minutes in a shading manner at room temperature to form a CT coating solution, flatly laying the prepared CP40 film on a planar carrier, coating the surface of a substrate film with the CT coating solution, and putting the composite film and the carrier into a drying oven at 45 DEG C for constant-temperature drying, so as to obtain the CP40 / CT% composite film. And after the solvent of the coating layer is completely volatilized, taking out and stripping to obtain the CP40 / CT% composite film. Under the action of hydrogen bonds and electrostatic attraction, a compact network structure of an amorphous-weak crystal region is formed in the composite film, so that the interface bonding strength of the film is enhanced, and the rigidity and flexibility of the film are balanced. The physical and chemical properties and biological activity of the composite membrane are synergistically optimized, and the composite membrane has obvious degradation signs after being buried in soil for 35 days and belongs to a biodegradable material.

The application discloses a kind of cement-based material surface biomimetic hydrophobic coating, including 0.1-0.6 parts of organic matter containing catechol group, 0.2-3 parts of dodecylamine, 17-75 parts of tris buffer solution, 13-69 parts of anhydrous ethanol, 0.1-0.5 parts of hydrogen peroxide, 0.1-1 parts of deposition aid;Coating surface microstructure is plate block and small spherical shape.The application also discloses the preparation method of the cement-based material surface biomimetic hydrophobic coating, including the following steps: mixing dopamine, dodecylamine, tris buffer solution and anhydrous ethanol, and loading into the middle part of atomization device container for spraying deposition solution;CuSO4 and H2O2 are divided and loaded into the container on both sides of atomization device;Each face of cement test block is sprayed, dried, and cyclically sprayed-dried;Surface is washed, and naturally dried.The application prepares biomimetic hydrophobic coating on cement-based material surface by one-step co-deposition method, and the prepared coating has the characteristics of good hydrophobicity and uniform deposition.

The present invention relates to the technical field of flame retardant materials, and specifically discloses a carbon quantum dot, a flame retardant biomass composite film, a preparation method and an application. The present invention uses urea and its derivatives as hydrogen bond donors, aminoglycerol-type substances as hydrogen bond acceptors, and then coordinates and combines with aluminate to obtain a precursor with good chemical stability; the precursor is used as a raw material to prepare carbon quantum dots through solvent thermal reaction. The flame retardant film formed by the carbon quantum dots, lignin and cellulose is used to modify the polymer substrate, which effectively solves the problems of poor compatibility and bonding between lignin, cellulose and the polymer substrate, and the synergistic effect between the carbon quantum dots and lignin and cellulose significantly improves the flame retardant effect of the biomass composite film. At the same time, it also effectively suppresses the smoke production when the polymer substrate burns, which is conducive to expanding the application field of polymer materials and has broad application prospects in the flame retardant field.

The application discloses a PMC-fiber bundle synergistically reinforced self-adaptive ecological slope protection matrix and a preparation method and application thereof, and belongs to the field of slope ecological restoration and functional materials. The matrix is composed of a PMC-mineralization functional composite bacterial system microcapsule core, a degradable fiber bundle skeleton and a carboxymethyl cellulose sodium / potassium polyacrylate composite humidity response type hydrogel carrier three-phase composite, and can automatically regulate active ingredient release and dormancy according to soil moisture content. The application forms a four-phase synergistic reinforcement system of "microorganism-root-fiber-mineral", solves the problems of disconnection of active release of traditional matrix, mechanical empty window period and insufficient interface strength, improves the root-soil-fiber interface friction coefficient, continuously enhances the slope shear strength, prolongs the effective period to 5 years, reduces the cost by 40%, and is suitable for ecological reinforcement of various slopes such as expansive soil and coarse-grained soil.

According to the anti-ultraviolet aging coating for the outer wall of the pipeline, the outer wall of the pipeline is coated with modified paint to form the anti-ultraviolet aging coating, and the coating thickness is 1-2 mm; the modified paint comprises the following raw materials in parts by weight: 35-40 parts of epoxy resin, 4-7 parts of an auxiliary agent, 8-12 parts of a curing agent and 30-35 parts of an acetone solvent. According to the anti-ultraviolet aging coating disclosed by the invention, the epoxy resin, the auxiliary agent, the curing agent, the reinforcing agent based on nanocellulose modification and the modifier are blended, and the modified paint prepared by matching and coordinating the raw materials is brushed on the outer wall of the pipeline, so that the prepared coating product has excellent impact resistance and adhesive force performance; the performance of the product is coordinated and balanced, and the anti-ultraviolet stability effect of the product is remarkable.

According to an example aspect of the present invention, there is provided an intumescent fire retardant composition comprising: an acid source comprising or consisting of ammonium phytate; and a carbon source selected from the group consisting of: carbohydrates, chemically modified lignins, tannin, and any combinations and derivatives thereof.

The application discloses a kind of green hydrophobic light-weight bio-based composite material of wood structure imitation and preparation method thereof, comprising the following steps: plant fiber is treated by low-alkali cooking pretreatment, standby;Starch is mixed with water, then 75-95 ℃ is added with ultrasonic vibration stirring 1-2h, then adding mesophilic alpha amylase is carried out enzymolysis, after enzymolysis is completed, oxidation treatment is carried out, then urea is added to starch, stirring reaction 1-2h, finally foaming agent is added, uniformly stirred, and the foaming hot melt modified starch is prepared;Wood pulp fiber, lignin, pretreated plant fiber and foaming hot melt modified starch are mixed according to proportion, and mixed slurry is obtained;The mixed slurry is injected in injection molding machine, and the intermediate bubble layer is prepared;A layer of waterproof film containing lignin nanocellulose slurry and polylactic acid mixed solution is sprayed on the surface of the intermediate bubble layer, and the dense waterproof layer is prepared, that is, obtained.

Provided is a novel oilproofing agent capable of imparting oil resistance to a substrate (in particular, a pulp substrate), the oilproofing agent containing a liquid-repellent compound and a lignin compound.

The invention discloses an environment-friendly coating which is prepared from the following raw materials in parts by weight: 40-60 parts of modified vegetable oil emulsion, 10-15 parts of a nano photocatalyst, 5-8 parts of plant fiber filler, 3-5 parts of a biomass calcium agent and 1.8-2.5 parts of a synergistic aid. The preparation method of the environment-friendly coating comprises the following steps: S1, plant fiber pretreatment; s2, carrying out antioxidant modification on the emulsion; s3, gradient grinding; and S4, curing. According to the environment-friendly coating, the oxidation chain reaction of soybean oil is blocked through tea polyphenol grafting, the free radical capture rate is high, aging is delayed, meanwhile, zero toxicity release and zero formaldehyde generation of the environment-friendly coating are achieved, and meanwhile the hardness defect of bio-based emulsion is effectively overcome through the soybean oil-tea polyphenol grafting technology; shell powder is used for loading TiO2 to form electron-hole pairs, so that formaldehyde can be purified for a long time; plant fibers are added and matched with shell powder and nano TiO2 to form a ternary reinforcing system, so that the crack resistance of a coating film is enhanced; the activity of natural components is protected through low-temperature grinding, and the retention rate of tea polyphenol is high.

The invention discloses a coal dust suppressant as well as a preparation method and application thereof. The coal dust suppressant is composed of a component A and a component B which are stored separately, the component A is in a liquid state, the component B is in a solid state, and the mass ratio of the component A to the component B is (1-5): 1; the component A is composed of 10-60 parts by mass of polyacrylic resin and 0.1-3 parts by mass of a stabilizer, and the component B is composed of 3-10 parts by mass of a pigment, 4-12 parts by mass of fiber particles and 0.5-3 parts by mass of a thickener; wherein the mass of the fiber particles is 1-2 times that of the pigment; the length of the fiber particles is 0.2-2.0 mm, and the particle size of the pigment is 800-1200 meshes. The dust suppressant disclosed by the invention realizes a direct color development effect on the surface of coal for the first time. Meanwhile, the dust suppressant has excellent adhesion and dust suppression performance, and the wind erosion rate of the dust suppressant under blowing erosion at the wind speed of 30 m / s and 40 m / s is smaller than 1.0.

The present invention is directed to a film or coating comprising a fiber material, wherein at least 60% by weight of said fiber material is microfibrillated cellulose, said film or coating also comprising at least 1% by weight of extractives from wood bark or cork wood. The invention is also directed to products, such as packaging materials, using or incorporating said film or coating. Such packaging materials are for example laminates or multi-layer structures. The films or coatings according to the present invention having advantageous barrier properties and are therefore particularly suitable for sensitive objects that need to be packaged in a controlled or modified atmosphere. The present invention is also directed to a composition comprising a fiber material, wherein at least 60% by weight of said fiber material is microfibrillated cellulose, said composition also comprising at least 1% by weight of extractives from wood bark or cork wood. The composition is useful for example in the preparation of the film or coating.

The invention provides a method for preparing a binder precursor, the method comprising the steps of: i) mixing (A) fungi or glucan and (B) starch with an alkaline agent in the presence of an aqueous solvent system to form an alkaline composition; ii) mixing the alkaline composition with an acidic agent to form a mixture; and iii) drying the mixture and forming a powder therefrom, so as to form a powdered binder precursor.

There is provided a release agent composition containing an aqueous solvent, that is, a release agent composition for forming a release agent layer that can be released by light irradiation and is used for a laminate, in the laminate in which a support substrate and a semiconductor substrate or an electronic device layer can be firmly adhered to each other during processing of the semiconductor substrate or the electronic device layer, and the support substrate and the semiconductor substrate or the electronic device layer can be easily separated from each other by light irradiation after the substrate processing. There is provided a release agent composition for light irradiation release for forming a release agent layer of a laminate which includes a semiconductor substrate or an electronic device layer, a light-transmissive support substrate, and a release agent layer provided between the semiconductor substrate or the electronic device layer and the support substrate, in which the electronic device layer includes a plurality of semiconductor chip substrates and a sealing resin disposed between the semiconductor chip substrates, and which is used for releasing the semiconductor substrate or the electronic device layer from the support substrate after the release agent layer absorbs light irradiated from the support substrate side, in which the release agent composition contains a light-absorbing compound that contributes to making the semiconductor substrate or the electronic device layer and the support substrate easily released by absorbing the light, and a solvent, and the solvent contains water.

The invention discloses a tannic acid-assisted antifouling coating for an inner seawater system as well as a preparation method and application of the tannic acid-assisted antifouling coating. According to the invention, tannic acid is used as an anchoring part of the antifouling coating to play a good fixing role on the surface of a base material through the adsorption effect, and then a physical interval is formed between tannic acid and the active center of protease through the connection of a hydrophilic substance in the middle layer, so that the conformation change or active site blockage possibly caused by tannic acid to protease is reduced, and the anti-fouling effect of tannic acid is improved. The activity of the protease is better maintained, and meanwhile, enough sites are provided for the protease, so that the protease can be effectively fixed on the surface of a base material to form an antifouling coating. Protein components in a biofilm matrix can be effectively degraded due to existence of protease on the surface of the antifouling coating, so that adhesion of bacteria and algae is prevented, and the antifouling coating has excellent antibacterial and anti-algae performance. The preparation method is simple, convenient, rapid, low in cost and suitable for preparation of the protective coating of the marine equipment and facilities in special scenes.

Resole resin compositions were made from a reaction of a lignin, an aldehyde, and a strong base, which is free of formaldehyde and free of per- and poly-fluoroalkyl substances. The aldehyde is one or more of a straight or branched chain dialdehyde, a phenolic aldehyde, and a furanic aldehyde. The resole resin is coated on a paper substrate to produce an oil resistant paper product suitable for food packaging, tableware, oil-resistant liners, and the like. Methods of making the resole resin composition and the paper products are also described herein.

The invention discloses a self-repairing AR anti-reflection film for a folding screen and a preparation process of the self-repairing AR anti-reflection film, and relates to the technical field of display device film materials. An efficient viscosity reducer comprises the following components: a base film layer, a self-repairing layer and an AR micro-nano structure layer; the modified chitin is used in the base film layer, and the laccase-loaded mesoporous silica microspheres and the lignin-based repairing agent are introduced into the self-repairing layer, so that the film layer still has no cracks after being bent for 300,000 times at the curvature of 3mm, the repairing efficiency reaches or exceeds 90%, the service life of the folding screen is remarkably prolonged, the stability of the folding screen is remarkably improved, and the service life of the folding screen is prolonged. The damage risk caused by frequent bending is reduced, meanwhile, the self-repairing function can be automatically recovered when slight damage occurs, and the service life of the product is further prolonged.

Wood mass composition for 3D printing of wooden objects, containing the following components (proportions based on weight): a) 100 ± 10 % Parts wood fiber / wood flour mixture b) 10 ± 10 % Methylcellulose c) 10 ± 10 % parts guar gum d) 10 ± 10 % Parts oil e) 8 ± 10 % parts alcohol f) 2 ± 10 % Parts shellac g) 300 ± 10 % parts of water h) 6 ± 10 % Parts of casein powder i) 6 ± 10 % parts slaked lime

The present invention relates to the technical field of composite film preparation, and in particular to a lignin-cellulose nanofiber-based composite film, a preparation method and an application. The preparation method includes: mixing a carboxylated cellulose nanofiber aqueous solution, a polyvinyl alcohol aqueous solution and an ethanol solution of 4-phenylazophenol, pouring the mixture into a mold, and drying the mixture to obtain a basement membrane; using polyimide and dealkalized lignin as raw materials, using polyethylene glycol diglycidyl ether as a cross-linking agent, and carrying out a condensation reaction in the presence of a solvent to obtain a dealkalized lignin-polyimide composite solution, applying the solution to a basement membrane, and drying the solution to obtain a lignin-cellulose nanofiber-based composite film. The lignin-cellulose nanofiber-based composite film obtained by the preparation method of the present invention not only has excellent light-to-heat conversion and humidity gradient change performance, but also has excellent wet responsiveness and light responsiveness, overcoming the defects of the prior art.

The invention relates to a composition for providing barrier properties for a cellulosic fibre web, such as paper, board or the like. The coating composition comprises microfibrillated non-wood biomass, having a particle size D90<250 μm and particle size D50<100 μm, which microfibrillated non-wood biomass comprises at least 5 weight-% of a hemicellulose fraction and / or pectin, calculated from the dry weight of the microfibrillated non-wood biomass; an auxiliary agent comprising at least one cellulose derivative, and / or a synthetic binding agent, such as polyvinyl alcohol or polystyrene acrylate copolymer.

Compositions and methods of protecting plants from cold damage are provided. In particular, the invention provides compositions comprising plant-based nano- and / or micron-sized particles which, when applied to plants or plant parts such as buds, form a non-hydrophilic deposit or film with low thermal conductivity, thereby conferring protection against damage from ice nucleation and cold stress.

The present invention is directed to a process for preparing a binder, wherein semi-washed lignin is mixed with a cross-linker and heated. The invention is also directed a binder obtained according to the process and to the use thereof.

The present disclosure relates to fiber and a method to obtain a fiber / filament comprising lignin, the method comprising the following steps: mixing 60-90 % (v / v) of lignin with a 10 to 40%(v / v) of solvent to obtain a lignin solution; providing polymer pellets; coating the polymer pellets by spraying the lignin solution; drying coated polymer pellets for removing the solvent through evaporation; placing the dried coated pellets into a melt-spinning equipment to obtain the fiber / filament. It also relates a fiber comprising: 70 to 95% (w / w) of a polymer selected from a list consisting of polylactic acid, polyhydroxyalkanoates, polyhydroxybutyrate, polycaprolactone or their mixtures; and 5 to 30% (w / w) of lignin.

The invention relates to the technical field of anticorrosive coatings, in particular to a preparation method of a coating based on functionalized basalt flakes, and the coating comprises the following raw materials in parts by weight: 40-50 parts of resin, 15-20 parts of magnetic basalt flakes, 10-15 parts of a solvent, 8-10 parts of a curing agent, 5-8 parts of a composite additive, 1-2 parts of a dispersing agent, 0.5-1 part of a flatting agent and 0.5-1 part of a defoaming agent. According to the invention, silicon hydroxyl hydrolyzed by a silane coupling agent is covalently bonded with a resin epoxy group, a sodium sulfonate group of sodium lignin sulfonate in the additive A and a hydroxyl group on the surface of basalt form a hydrogen bond, and meanwhile, chitosan amino in the additive B reacts with a graphene carboxyl group to form an amido bond, and cross-linking fixation is carried out; chemical bonding and physical anchoring of the filler and the resin are enhanced in a multi-dimensional manner, so that the interface bonding strength is improved, and the coating is not easy to peel off.